They are not painted yet. They are made out of 1/8" aluminum. Center hole is tapped for 1/4-20, outer holes are drilled @ 1/4".
They serve a couple of purposes. Great for increased power when shooting outdoors in harsh sun. They also work well for filling LARGE octaboxes, and softboxes with even light.
Also works good for shooting both lights @ lower power settings for faster recharge times. But still getting the light that is needed.